A major two-volume work on devolution in the UK from the initial settlement under New Labour in 1997 to Brexit and its aftermath up to 2020. This second volume gives a comprehensive analysis of the tumultuous years in which Scotland voted on independence in 2014 and the UK departed from the European Union in 2019. Both empirically detailed and theoretically informed, it focuses on each of Scotland, Wales, Northern Ireland, and England, as well as the UK as a whole, providing a rigorous and refreshing analysis of the period that will stimulate further thought on the development of devolution in the UK. This is the most complete work on devolution in the UK to date, which is both empirically rich and theoretically innovative.